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M350S

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ID = 50889
       
Country:
Netherlands
Brand: Radio-Record - Röhrenmarke; Holland
Developer: Radio-Record - Röhrenmarke; Holland 
Tube type:  Triode, vacuum 
  Ca. 1925 up to 1945 rare.
Identical to M350S
Similar Tubes
Normally replaceable-slightly different:
  B438 ; HR410

Base Europe 4-Pin (A, 4A, B4, since 1914)
Filament Vf 4 Volts / If 0.1 Ampere / Direct / Series, DC
Description Lf amplifier, resister coupling. 
Literature - - Manufacturers Literature   1933
 
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M350S
Peter den Boer

 
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M350S: own collection
Peter den Boer


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